From: Simon Glass <sjg@chromium.org>
To: U-Boot Mailing List <u-boot@lists.denx.de>
Cc: "Ilias Apalodimas" <ilias.apalodimas@linaro.org>,
"Sean Anderson" <seanga2@gmail.com>,
"Heinrich Schuchardt" <xypron.glpk@gmx.de>,
"Tom Rini" <trini@konsulko.com>,
"Mark Kettenis" <mark.kettenis@xs4all.nl>,
"François Ozog" <francois.ozog@linaro.org>,
"Simon Glass" <sjg@chromium.org>,
"Jerry Van Baren" <vanbaren@cideas.com>
Subject: [PATCH v8 24/32] fdt: Don't call board_fdt_blob_setup() without OF_BOARD
Date: Thu, 16 Dec 2021 20:59:31 -0700 [thread overview]
Message-ID: <20211217035939.670884-25-sjg@chromium.org> (raw)
In-Reply-To: <20211217035939.670884-1-sjg@chromium.org>
At present this override function is called even when OF_BOARD is not
enabled. This makes it impossible to disable this feature and in fact
makes the OF_BOARD option useless.
Reinstate its intended purpose, so that it is possible to switch between
the appended devicetree and one provided by the board's custom function.
A follower patch adds warnings for this scenario, but for now we don't
have a Kconfig that definitively tells us that OF_BOARD should be used.
Signed-off-by: Simon Glass <sjg@chromium.org>
---
Changes in v8:
- Mention the follower patch
Changes in v7:
- Fix 'Is' typo in commit message
Changes in v5:
- Add new patches to clean up fdtdec_setup() and surrounds
include/fdtdec.h | 7 +++++--
lib/fdtdec.c | 21 ++++++++++++---------
2 files changed, 17 insertions(+), 11 deletions(-)
diff --git a/include/fdtdec.h b/include/fdtdec.h
index 68786111a44..68a36f10583 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -1170,10 +1170,13 @@ int fdtdec_resetup(int *rescan);
/**
* Board-specific FDT initialization. Returns the address to a device tree blob.
- * Called when CONFIG_OF_BOARD is defined, or if CONFIG_OF_SEPARATE is defined
- * and the board implements it.
+ *
+ * Called when CONFIG_OF_BOARD is defined.
+ *
+ * The existing devicetree is available at gd->fdt_blob
*
* @err internal error code if we fail to setup a DTB
+ * @returns new devicetree blob pointer
*/
void *board_fdt_blob_setup(int *err);
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index a7f62123a94..31a509bc221 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -1203,15 +1203,15 @@ static int uncompress_blob(const void *src, ulong sz_src, void **dstp)
return 0;
}
-/*
- * For CONFIG_OF_SEPARATE, the board may optionally implement this to
- * provide and/or fixup the fdt.
+/**
+ * fdt_find_separate() - Find a devicetree at the end of the image
+ *
+ * @return pointer to FDT blob
*/
-__weak void *board_fdt_blob_setup(int *err)
+static void *fdt_find_separate(void)
{
void *fdt_blob = NULL;
- *err = 0;
#ifdef CONFIG_SPL_BUILD
/* FDT is at end of BSS unless it is in a different memory region */
if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS))
@@ -1626,13 +1626,16 @@ int fdtdec_setup(void)
int ret;
/* The devicetree is typically appended to U-Boot */
- if (IS_ENABLED(CONFIG_OF_SEPARATE) || IS_ENABLED(CONFIG_OF_BOARD)) {
- /* Allow the board to override the fdt address. */
+ if (IS_ENABLED(CONFIG_OF_SEPARATE))
+ gd->fdt_blob = fdt_find_separate();
+ else /* embed dtb in ELF file for testing / development */
+ gd->fdt_blob = dtb_dt_embedded();
+
+ /* Allow the board to override the fdt address. */
+ if (IS_ENABLED(CONFIG_OF_BOARD)) {
gd->fdt_blob = board_fdt_blob_setup(&ret);
if (ret)
return ret;
- } else { /* embed dtb in ELF file for testing / development */
- gd->fdt_blob = dtb_dt_embedded();
}
if (!IS_ENABLED(CONFIG_SPL_BUILD)) {
--
2.34.1.173.g76aa8bc2d0-goog
next prev parent reply other threads:[~2021-12-17 4:04 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-17 3:59 [PATCH v8 00/32] fdt: Make OF_BOARD a boolean option Simon Glass
2021-12-17 3:59 ` [PATCH v8 01/32] arm: qemu: Mention -nographic in the docs Simon Glass
2021-12-24 14:34 ` Tom Rini
2021-12-17 3:59 ` [PATCH v8 02/32] arm: riscv: qemu: Explain how to extract the generated dt Simon Glass
2021-12-17 3:59 ` [PATCH v8 03/32] arm: qemu: Add a devicetree file for qemu_arm Simon Glass
2021-12-17 3:59 ` [PATCH v8 04/32] arm: qemu: Add a devicetree file for qemu_arm64 virt Simon Glass
2021-12-17 3:59 ` [PATCH v8 05/32] riscv: qemu: Split devicetree files for qemu_riscv32/64 Simon Glass
2021-12-17 3:59 ` [PATCH v8 06/32] arm: rpi: Sync rpi dts files from Linux Simon Glass
2021-12-17 3:59 ` [PATCH v8 07/32] arm: vexpress: Add a devicetree files for juno Simon Glass
2021-12-18 3:30 ` Linus Walleij
2021-12-17 3:59 ` [PATCH v8 08/32] arm: xenguest_arm64: Add a empty devicetree file Simon Glass
2021-12-17 3:59 ` [PATCH v8 09/32] arm: octeontx: Add an " Simon Glass
2021-12-17 3:59 ` [PATCH v8 10/32] arm: xilinx_versal_virt: Add a " Simon Glass
2021-12-17 3:59 ` [PATCH v8 11/32] arm: bcm7xxx: " Simon Glass
2021-12-17 3:59 ` [PATCH v8 12/32] arm: qemu-ppce500: " Simon Glass
2021-12-17 3:59 ` [PATCH v8 13/32] arm: highbank: Add devicetree files Simon Glass
2021-12-17 3:59 ` [PATCH v8 14/32] fdt: Make OF_BOARD a bool option Simon Glass
2021-12-17 3:59 ` [PATCH v8 15/32] fdt: Drop CONFIG_BINMAN_STANDALONE_FDT Simon Glass
2021-12-17 3:59 ` [PATCH v8 16/32] fdt: Make it easier to debug u-boot.dtsi files Simon Glass
2021-12-17 3:59 ` [PATCH v8 17/32] fdt: Move MULTI_DTB_FIT handling out of fdtdec_setup() Simon Glass
2021-12-17 3:59 ` [PATCH v8 18/32] fdt: Drop #ifdefs with MULTI_DTB_FIT Simon Glass
2021-12-17 3:59 ` [PATCH v8 19/32] fdt: Drop CONFIG_SPL_BUILD check in fdtdec_setup() Simon Glass
2021-12-17 3:59 ` [PATCH v8 20/32] fdt: Drop #ifdef around board_fdt_blob_setup() Simon Glass
2021-12-17 3:59 ` [PATCH v8 21/32] fdt: Use if() for fdtcontroladdr check Simon Glass
2021-12-17 3:59 ` [PATCH v8 22/32] fdt: Drop OF_CONTROL check in fdtdec_setup() Simon Glass
2021-12-17 3:59 ` [PATCH v8 23/32] fdt: Drop remaining preprocessor macros " Simon Glass
2021-12-17 3:59 ` Simon Glass [this message]
2021-12-17 3:59 ` [PATCH v8 25/32] dm: core: Allow getting some basic stats Simon Glass
2021-12-17 3:59 ` [PATCH v8 26/32] fdt: Record where the devicetree came from Simon Glass
2021-12-17 3:59 ` [PATCH v8 27/32] fdt: Report the devicetree source Simon Glass
2021-12-17 3:59 ` [PATCH v8 28/32] fdt: Add a Kconfig for boards with a prior stage Simon Glass
2021-12-17 3:59 ` [PATCH v8 29/32] fdt: Enable OF_HAS_PRIOR_STAGE for most boards with OF_BOARD Simon Glass
2021-12-17 3:59 ` [PATCH v8 30/32] fdt: Makefile: Ensure that OF_BOARD is used when needed Simon Glass
2021-12-24 14:34 ` Tom Rini
2021-12-17 3:59 ` [PATCH v8 31/32] fdt: Avoid emitting an device tree when not needed Simon Glass
2021-12-17 3:59 ` [PATCH v8 32/32] fdt: Show a runtime warning based on devicetree source Simon Glass
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